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Web App
Updated 9 Oct 2026

Web App

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The web app opens in a browser on a computer via this link: https://corp.express/.

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Your organization may use a web app with specific name and link.
You can check the SHA512 hash and version information of the eXpress web app in the YML file: eXpress Web.

Does My Data Go to corp.express?

No. From the corp.express address, the browser only downloads the files of the web application itself. After loading, the app runs on your device and exchanges data directly with your organization's server — just like the desktop app.

Messaging, files, calls, and credentials are transmitted according to the standard eXpress rules, between your device and your corporate server. They do not pass through corp.express and are not stored on it.

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If your organization opens the web app at its own address, everything stated applies to it as well: it is the same web client hosted on a different host. The address only affects where the browser downloads the web app from.

System Requirements for the Web App

Computer
  • At least 4 GB of RAM
  • CPU with actual clock speed from 2.6 GHz (including Turbo Boost), 4 logical cores (threads)
  • At least 1 GB of free disk space
Operating System
  • Windows 10 x64 and higher. To check the Windows version, press Win + R, enter winver , and press Enter.
  • macOS 10.15 x64 and later. To check the macOS version, click the Apple logo > About This Mac. For 32-bit operating systems, please use the web application version in your browser.
  • Linux x64: Ubuntu 14.04, Fedora 24, Debian 8, Astra Linux 1.25 and later, Alt Linux, and other Linux distributions. To check the Linux version, enter lsb_release -a in the terminal.
The requirements for virtual backgrounds and video background blur are described separately.

Browsers

⚠️ The web app does not work in mobile browsers.

The browser version must be no lower than the minimum in the table.
Browser Minimum Version How to Check the Version
Apple Safari 11 Safari > About Safari
Chromium 120 Enter the address chromium://version/
Google Chrome 118 Enter the address chrome://version/
Microsoft Edge 118 Enter the address edge://version
Mozilla Firefox 120 Enter the address about:support
Opera 100 Enter the address opera://about
Vivaldi 6.5 Enter the address vivaldi://about/
Yandex Browser 23 Enter the address browser://help/

Required Permissions

Location Steps
OS Settings Allow the browser to access the camera, microphone, screen, and notifications.
Browser settings Allow the web app access to notifications, clipboard, microphone, and camera, as well as local network access.
⚠️ Without local network access permission, the web app may fail to connect to the corporate server or establish calls — especially when working over VPN: learn more.
Safari Settings To make the web app play sound signals: Safari > Settings > Websites > Auto-Play > select Always for the web app.

Browser Extensions

Disable ad blocker/VPN/proxy extensions or add the web app site to their exceptions.

How Does Working in a Browser Differ from the Desktop App?

What Desktop app Web app
Access to servers on the local network No restrictions. On macOS, the system Local Network permission is required Requires browser permission, and on macOS also the system permission for the browser
Extensions and blockers No impact Can block app traffic
Proxy server System proxy or set via the --proxy-server key System proxy or configured in the browser, including via extensions
Virtual backgrounds and background blur Supported Not supported in Mozilla Firefox and Apple Safari
Autostart and background operation Supported Only while the tab is open and if background tab throttling is not configured
Mobile devices Separate apps for all platforms Does not work in mobile browsers, except for guests joining calls
The network accesses for the web app and the desktop app are the same: the browser connects to the same servers and ports — see “Where App Traffic Goes”.

Installing Certificates for the Web App

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Non-standard corporate server certificates are required so that connecting to the server works. By default, installing them is not required. See the instructions for operating systems:


Updating the Web App

Click the Update button in the pop-up window or in the app settings.

Progressive Web App

The web app can be installed as a progressive web app (PWA): open the web app and click the install button in the address bar.

Web App Widget

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A web application widget can be embedded on the organization's internal corporate portal. The description and code are available in the repository (in Russian).

What Does the Web App Widget Look Like?

When the script is added to the page, a button appears in the lower-right corner. The button opens the eXpress window, through which an employee can log in to the app and contact a colleague.

Guest Access Using Web App

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The web app is used for guests to join chats (PC only), as well as calls and conferences (on both PC and mobile devices).

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